Sport helmet



FIG. 1 is a perspective view from the front and left of a sport helmet showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front end view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear end view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the chin strap in the figures is for illustrative purposes only and forms no part of the claimed design. 

I claim the ornamental design for a sport helmet, as shown and described. 